Booth and ejecting device

ABSTRACT

A booth including an ejecting unit that ejects air into an opening portion leading to an internal space partitioned from an external space. The ejecting unit forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space and a second airflow that suppresses introduction of the first airflow into the internal space inside the first airflow.

RELATED APPLICATIONS

The contents of Japanese Patent Application No. 2018-167305, and of International Patent Application No. PCT/JP2019/034480, on the basis of each of which priority benefits are claimed in an accompanying application data sheet, are in their entirety incorporated herein by reference.

BACKGROUND Technical Field

Certain embodiments of the present invention relate to a booth and an ejecting device.

Description of Related Art

Booths for performing assembling of electronic components and precision components, various kinds of work such as experiments, and the operations of process devices and precision machines are known. In such booths, partition members (walls, ceilings, and the like) are used to isolate an internal space from an external space and maintain environmental conditions such as temperature, humidity, and cleanliness.

SUMMARY

According to an embodiment of the present invention there is provided a booth according to an aspect of the present invention includes an ejecting unit that ejects air into an opening portion leading to an internal space partitioned from an external space. The ejecting unit forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space and a second airflow that suppresses introduction of the first airflow into the internal space and is formed inside the first airflow.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic configuration view illustrating a booth according to Embodiment 1 of the present invention.

FIG. 2 is a schematic vertical cross-sectional view illustrating the booth according to Embodiment 1 of the present invention.

FIG. 3 is a schematic configuration view illustrating an ejecting device according to Embodiment 1 of the present invention.

FIG. 4 is a schematic horizontal cross-sectional view illustrating a booth according to Embodiment 1 of the present invention.

FIGS. 5A and 5B are schematic horizontal cross-sectional views illustrating a booth according to Embodiment 2 of the present invention.

FIG. 6 is a schematic vertical cross-sectional view illustrating a booth according to Embodiment 3 of the present invention.

FIG. 7 is a schematic vertical cross-sectional view illustrating a booth according to Embodiment 4 of the present invention.

FIG. 8 is a schematic vertical cross-sectional view illustrating a booth according to Embodiment 5 of the present invention.

FIG. 9 is a front view of a booth according to Embodiment 6 of the present invention.

FIG. 10 is a front view of a booth according to Embodiment 7 of the present invention.

FIG. 11 is a front view of a booth according to Embodiment 8 of the present invention.

FIG. 12 is a front view of a booth according to Embodiment 9 of the present invention.

FIGS. 13A and 13B illustrative results of simulation of the temperature distribution of the booth of the present invention.

FIGS. 14A to 14C illustrate results of simulation regarding the temperature distribution of the booth of the present invention.

FIGS. 15A to 15C illustrate results of simulation regarding the temperature distribution of the booth of the present invention.

DETAILED DESCRIPTION

In the booths, a doorway that allows access to the internal space is required for the entrance and exit of workers and the carrying-in and carrying-out of goods. In a case where a structure such as a door, a sliding door, or a curtain is provided at the doorway, the access is complicated and the workability deteriorates. Thus, it is considered that the doorway is simply an opening portion without such a structure. However, in this case, the blocking from the external space is insufficient, and it is difficult to perform air-conditioning control, for example, temperature control and humidity control in the internal space. Additionally, there is a concern that dust is mixed into the internal space from the opening portion, which lowers the cleanliness of the internal space. In this way, in a case where the doorway of the booth is simply the opening portion, various environmental conditions (temperature, humidity, cleanliness, and the like) deteriorate.

It is desirable to realize a booth that allow easy access to an internal space without deteriorating environmental conditions.

Embodiment 1

Hereinafter, one embodiment of the present invention will be described in detail.

Overall Configuration of Booth

FIG. 1 is a view illustrating a schematic configuration of a booth 10 according to Embodiment 1. Additionally, FIG. 2 is a view schematically illustrating a vertical cross-section observed from the side of the booth 10. The booth 10 has an internal space S partitioned from an external space formed by a ceiling portion 101, two side wall portions 102, a front wall portion 103, and a rear wall portion 104, which are partition members assembled on a floor 90 (not included in the components of the booth 10). The size of the internal space S is not limited to a specific value and can be, for example, about 3 to 20 m in a depth direction, 3 to 20 m in a width direction, and 2 to 5 m in a height direction.

An opening portion 105 is provided in a part of the front wall portion 103 in the vicinity of the center thereof to constitute a doorway to the internal space S. The size of the opening portion 105 is not limited to a specific value and can be, for example, about 1 to 3 m in the width direction smaller than the width of the internal space and about 2 to 5 m in the height direction smaller than the height of the internal space S.

Additionally, the booth 10 includes an air conditioning device (air conditioning unit) 150 outside the internal space S and performs the air-conditioning control of the internal space S. The internal space S is a region for performing work in environments of which the atmosphere is air-conditioning controlled, such as assembling of electronic components and precision components, various kinds of work such experiments, and the operations of process devices and precision machines, machine operations, and the like. The air-conditioning control is specifically temperature control in Embodiment 1. However, the air-conditioning control is not limited to the temperature control and may be, for example, humidity control or cleanliness control.

The partition members (ceiling portion 101, side wall portion 102, front wall portion 103, rear wall portion 104) may be made of any appropriate known materials that are used as booth wall materials or ceiling materials such as vinyl curtains, heat-insulating uninflammable panels, glass, acrylic plates, and metal plates. Additionally, in order to maintain the structural strength, it is preferable that the partition members are assembled by appropriately using frames, columns, beams, and the like.

The booth 10 is provided with an ejecting device (ejecting unit) 120 for ejecting air into the opening portion 105. As a specific attachment position of the ejecting device 120, for example, the ejecting device 120 can be attached to a part of the front wall portion 103 that is an end portion of the opening portion 105. Additionally, a suction device (suction unit) 130 for suctioning air is attached to a position facing the ejecting device 120 (for example, a part of the front wall portion 103 that is an edge portion of the opening portion 105). The ejecting device 120 and the suction device 130 are disposed outside the front wall portion 103 along a vertical line, respectively, on the left and right sides of the opening portion 105. Additionally, an air ejection port of the ejecting device 120 and an air suction port of the suction device 130 are disposed so as to face each other. In addition, the booth 10 of Embodiment 1 is provided with one ejecting device 120 and one suction device 130. However, a plurality of ejecting devices 120 may be configured to be installed side by side along the edge portion of the opening portion 105 so as to play substantially the same role as one large ejecting device. The same applies to the suction device.

Temperature Control of Internal Space

An introduction port 111 for introducing temperature-controlled air into the internal space S of the booth 10 is provided on a bottom surface of the ceiling portion 101. The air controlled to a predetermined temperature is fed from the air conditioning device 150 through a pipe 143 to the introduction port into the introduction port 111. The introduction port 111 releases a uniformized airflow (downflow) of which a blowing direction is controlled downward to the internal space S. In FIG. 1, the introduction port 111 is drawn as two members divided into left and right. However, this is merely an example and may be constituted of a single member or two or more of a plurality of members, and may be provided on substantially the entire surface of the ceiling portion 101. Additionally, the introduction port 111 is attached to the rear wall portion 104 as exemplified in FIG. 1 and does not have to have a shape extending in the depth direction. For example, the introduction port 111 may be hung from the ceiling portion 101 or embedded in the ceiling portion 101. Additionally, it is preferable that the introduction port 111 is provided with a filter or a mesh for removing dust and the like.

The air fed into the internal space S is drawn into a lead-out port 112 provided at a lower part of the rear wall portion 104 and is recovered to the air conditioning device 150 through a pipe 144 to the lead-out port. The shape of the lead-out port 112 maybe a horizontally long rectangular shape as illustrated in FIG. 1 but other shapes or any number of holes can be appropriately used. Here, the pipe may be, specifically, a circular tubular member, an angular tubular member, a duct, or the like, and the same applies to the following.

In this way, the air temperature-controlled by the air conditioning device 150 is circulated, so that the internal space S of the booth 10 is controlled to a predetermined temperature. The wind speed of the airflow blown out from the introduction port 111 is not limited to a specific value but it is desirable that the wind speed is as slow as 0.1 to 1 m/s. This is because in a case where the wind speed is high, there is a spot that is partially cooled by the airflow directly hitting the equipment and furniture installed in the internal space S and there is a concern of causing a temperature distribution. In addition, in the present application, the wind speed of the airflow is defined by the wind speed (blow-out wind speed) directly below a blow-out port such as the introduction port and the ejection port.

Additionally, it is not preferable in terms of temperature control that the outside air directly flows into the internal space S. Thus, the internal space S is maintained at a slightly positive pressure by the air conditioning device 150. For that reason, air slightly flows out from the internal space S through the opening portion 105 and the like (EA in FIG. 2). In order to compensate for the outflowing air and further keep the internal space S at a positive pressure, the air conditioning device 150 takes in air from an outside air intake port 151, adjusts the temperature together with the air recovered from the internal space S, and provides a required volume of air to a required spot.

Airflow Control at Opening Portion

Moreover, the characteristic airflow control in the opening portion 105 will be described with reference to FIGS. 3 and 4. FIG. 3 is a schematic view illustrating the ejecting device 120 according to Embodiment 1. FIG. 4 is a view schematically illustrating a horizontal cross-section of the booth 10.

Temperature-controlled air is supplied from the air conditioning device 150 through a pipe 141 to the ejecting device to the ejecting device 120. The ejecting device 120 includes an outside ejection port 121 (first ejection port) and an inside ejection port 122 (second ejection port) that are vertically elongated, respectively, and correspond to the length of the opening portion 105 in the vertical direction. The outside ejection port 121 and the inside ejection port 122 are parallel to each other. The outside ejection port 121 is provided on a side farther from the internal space S than the inside ejection port 122. The lengths of the outside ejection port 121 and the inside ejection port 122 are not limited to a specific values and may be, for example, 2 to 5 m. Additionally, as described above, in a case where the plurality of ejecting devices 120 are configured to be installed side by side along the edge portion of the opening portion 105, the lengths of the outside ejection port 121 and the inside ejection port 122 are not limited to specific value and may be, for example, about 0.5 to 2 m.

The outside ejection port 121 blows out an outside airflow 126 (first airflow) in a horizontal direction parallel to a plane formed by the opening portion 105 (parallel to the front wall portion 103). Here, the outside airflow 126 is a layered airflow that covers the opening portion 105, that is, an air curtain. Additionally, the inside ejection port 122 blows out an inside airflow 127 (second airflow) in the horizontal direction parallel to the plane formed by the opening portion 105 (parallel to the front wall portion 103). Here, the inside airflow 127 is a layered airflow covering the opening portion 105, which is also an air curtain. The direction of the outside airflow 126 and the direction of the inside airflow 127 are parallel to each other and the same direction.

The inside airflow 127 is a weaker airflow than the outside airflow 126. Here, the weaker airflow means that the wind speed is relatively low (slow). The preferable wind speed of the outside airflow 126 is 4 to 8 m/s and may typically be 5 m/s. The preferable wind speed of the inside airflow 127 is relatively lower than the wind speed of the outside airflow 126 and is 3 to 6 m/s, and may typically be 4 m/s. Moreover, by maintaining the internal pressure at a positive pressure, the wind speed can be lowered. In that case, the preferable wind speed may be 3 to 6 m/s for the outside airflow 126 and 2 to 4 m/s for the inside airflow 127. By reducing the wind speed, the turbulence of the flow of air is reduced, and the effect of the present invention of suppressing the influence of the disturbance on the internal space S can be further exhibited. In any case, the wind speeds of the outside airflow 126 and the inside airflow 127 are not limited to the above range and may appropriately have different values. However, as described above, the outside airflow 126 needs to have a higher wind speed than the inside airflow 127.

Additionally, more preferably, the wind speed of the inside airflow 127 is higher than the wind speed of the airflow blown out from the introduction port 111 in the internal space S.

The suction device 130 plays a role of suctioning air such that the outside airflow 126 and the inside airflow 127 do not disturb the flow of each as a layered airflow. It is desirable that the suction device 130 has two vertically elongated suction ports that correspond to the outside airflow 126 and the inside airflow 127, respectively. However, the suction device 130 may have one vertically elongated suction port for suctioning both the outside airflow 126 and the inside airflow 127. It is desirable that the length of the vertically elongated suction port is almost the same as that of the outside ejection port 121 or the inside ejection port 122 of the ejecting device 120. The air suctioned by the suction device 130 is fed through the pipe 142 directed to the suction device into the air conditioning device 150.

Additionally, the wind speeds of the outside airflow 126 and the inside airflow 127 can be appropriately adjusted depending on the distance between the ejecting device 120 and the suction device 130. The distance between the ejecting device 120 and the suction device 130 is specifically the distance between the outside ejection port 121 (first ejection port) in the ejecting device 120 and the suction port of the suction device 130 for suctioning the outside airflow 126 and the distance between the inside ejection port 122 (second ejection port) in the ejecting device 120 and the suction port of the suction device 130 for suctioning the inside airflow 127. The preferable wind speed of the outside airflow 126 with respect to the distance between the ejecting device 120 and the suction device 130 is 2.5 to 5.5 m/s per 1 meter of the distance between the ejecting device 120 and the suction device 130 and may typically be 3.3 m/s. The preferable wind speed of the inside airflow 127 with respect to the distance between the ejecting device 120 and the suction device 130 is 2 to 4 m/s per 1 meter of the distance between the ejecting device 120 and the suction device 130 and may typically be 2.7 m/S. Moreover, in a case where the internal pressure is maintained at a positive pressure, the wind speed may be 2 to 4 m/s for the outside airflow 126 and 1 to 3 m/s for the inside airflow 127 per 1 meter of the distance between the ejecting device 120 and the suction device 130. By reducing the wind speed, the turbulence of the flow of air is reduced, and the effect of the present invention of suppressing the influence of the disturbance on the internal space S can be further exhibited.

Effects in Embodiment 1

The followings are realized in the booth 10 according to Embodiment 1 by virtue of the above configuration.

Since the opening portion 105 is included in a part of the front wall portion 103, the entrance and exit of workers and the carrying-in and carrying-out of goods are easy, and access to the internal space S is excellent. For that reason, the efficiency of various kinds of work using the booth 10 is improved.

Generally, in a booth including such an opening portion, it is difficult to perform the air-conditioning control of the internal space due to the inflow of outside air and the outflow of air in the internal space. For example, in a case where the temperature control is performed as the air-conditioning control, it is difficult to set the internal space S to a predetermined uniform temperature due to the inflow of outside air (an example of disturbance) of which the temperature control is insufficient. Additionally, the inflow of wind (an example of disturbance) into the internal space also causes the flow of air in the internal space to be disturbed. However, since the booth 10 is configured to form an airflow serving as the air curtain in the opening portion 105, the inflow of outside air and the outflow of air in the internal space can be suppressed. That is, the air booth 10 works in the direction of blocking the inside and outside.

Additionally, the booth 10 has a characteristic configuration in which the outside airflow 126 (first airflow) and the inside airflow 127 (second airflow) are formed at the opening portion 105, and the inside airflow 127 is weaker than the outside airflow 126. The significance of such a characteristic configuration will be described below.

The present inventors initially studied a configuration in which a single-layer airflow (air curtain) is formed at the opening portion. Then, in a case where the wind speed of the airflow was low, the effect of suppressing the inflow of outside air and the outflow of air in the internal space was poor, and a targeted temperature control in the internal space S could not be performed. More specifically, the targeted temperature control here means that the distribution of temperature in the internal space S can be controlled to be within ±0.1 degrees with respect to a temperature target value.

Next, an attempt to increase the wind speed of the airflow was made in order to enhance the effect of blocking the inside and outside. However, in a case where the wind speed of the single-layer airflow was increased, the air in the internal space was drawn in and accelerated, and the airflow entered the internal space. As a result, a spot having a high wind speed was partially formed in the internal space, and the targeted temperature control in the internal space could not be performed. This is because the temperature distribution in the internal space S is disturbed because the spot having a high wind speed is partially formed. Although various wind speeds were studied, a targeted temperature distribution in the internal space could not be realized in the single-layer airflow (air curtain).

Additionally, although the temperature distribution of the internal space S has been described here, the humidity distribution is almost the same.

Additionally, it was also found that the adoption of a single-layer airflow does not suitably prevent the mixing of dust. In a case where the wind speed of the single-layer airflow is lowered, there is a concern that the prevention of mixing of dust into the internal space S by virtue of the airflow may not work sufficiently. On the other hand, in a case where the single-layer airflow is increased, dust may be involved in the entering of the airflow into the above-described internal space S, and as a result, there is a case where the dust is mixed into the internal space.

Thus, the present inventors have come up with the idea of forming a two-layer airflow of an outside airflow 126 having a high wind speed and an inside airflow 127 having a weaker wind speed than the outside airflow 126 at the opening portion 105, and have completed the present invention. The outside airflow 126 having a high wind speed plays a role of making the effect of blocking the inside and outside sufficient. That is, the outside airflow 126 plays a role of suppressing the influence of the disturbance on the internal space S. On the other hand, the relatively weak inside airflow 127 plays a role of suppressing the entering of the outside airflow 126 having a high wind speed into the internal space S. Additionally, by adopting such a unique airflow configuration and disposition, in the booth 10, the targeted temperature control and humidity control in the internal space S can be realized, and dust can be suitably prevented from being mixed into the internal space.

Moreover, the booth 10 includes a suction device 130 that is provided at the edge portion of the opening portion 105 so as to face the ejecting device 120 and suctions air. By virtue of the present configuration, disturbance of the outside airflow 126 (first airflow) and the inside airflow 127 (second airflow) even in the regions of the opening portion 105 separated from the outside ejection port 121 and the inside ejection port 122 is suppressed. Thus, the targeted temperature control, humidity control, and prevention of mixing of dust in the internal space S can be suitably realized.

Additionally, by making the directions of the outside airflow 126 (first airflow) and the inside airflow 127 (second airflow) horizontal, the ejecting device 120 and the suction device 130 can be longitudinally mounted on the left and right sides of the opening portion 105. Thus, a booth including the ejecting device 120 and the suction device 130 can be easily manufactured.

In the booth 10, the outside airflow 126 (first airflow) and the inside airflow 127 (second airflow) are formed by the air supplied from the air conditioning device 150. By forming the outside airflow 126 and the inside airflow 127 with the air that is air-conditioning controlled by the air conditioning device 150, the factors of disturbing the control of the internal space S are suppressed, and the targeted air-conditioning control in the internal space S is reliably realized.

The ejecting device 120 according to Embodiment 1 used in the booth 10 includes the outside ejection port 121 (first ejection port) for forming the outside airflow 126 (first airflow) and the inside ejection port 122 (second ejection port) for forming the inside airflow 127 (second airflow) weaker than the outside airflow 126. By applying the ejecting device 120 having the present configuration to a booth including with an opening portion, it is possible to realize a configuration in which the temperature control of the internal space is made excellent while access to the internal space is excellent.

Embodiment 2

Another embodiment of the present invention will be described below. In addition, for convenience of description, the members having the same functions as the members described in the above embodiment will be denoted by the same reference numerals, and the description thereof will not be repeated.

FIGS. 5A and 5B are views illustrating a schematic configuration of a booth 20 according to Embodiment 2. FIG. 5A is a view schematically illustrating a cross-section in the horizontal direction for illustrating the schematic configuration of the booth 20 according to Embodiment 2. Unlike the booth 10 according to Embodiment 1, the booth 20 does not include the suction device 130 and the pipe 142 to the suction device. Additionally, unlike the booth 10, the ejecting devices 120 are included on both the left and right edge portions of the opening portion 105. The pipe 141 to the ejecting device for supplying air-conditioning controlled (temperature-controlled) air from the air conditioning device 150 is connected to each of the ejecting devices 120.

The left and right ejecting devices 120 each form a two-layer airflow of an outside airflow 226 (first airflow) having a high wind speed and an inside airflow 227 (second airflow) weaker than the outside airflow 226. Thus, the outer shapes of the left and right ejecting devices 120 are mirror-symmetrical to each other. In addition, the direction of each airflow is the horizontal direction.

The preferable wind speed of the outside airflow 226 is 2 to 4 m/s and may typically be 3 m/s. The preferable wind speed of the inside airflow 227 is relatively smaller than the wind speed of the outside airflow 226 and is 1 to 3 m/s, and may typically be 2 m/s. In any case, the wind speeds of the outside airflow 226 and the inside airflow 227 are not limited to the above range and may be appropriately different values. However, as described above, the outside airflow 226 needs to have a higher wind speed than the inside airflow 227.

Additionally, the wind speeds of the outside airflow 226 and the inside airflow 227 can be appropriately adjusted depending on the distance between the outside ejection ports 121 (first ejection ports) or between the inside ejection ports 122 (second ejection ports) of the left and right ejecting devices 120. The preferable wind speed of the outside airflow 226 with respect to the distance between the left and right outside ejection ports 121 is 1 to 3 m/s per 1 meter of the distance between the left and right outside ejection ports 121 and may typically be 2 m/s. The preferable wind speed of the inside airflow 227 with respect to the distance between the left and right inside ejection ports 122 is 0.5 to 2 m/s per 1 meter of the distance between the left and right inside ejection ports 122 and may typically be 1.3 m/s.

In the booth 20 according to Embodiment 2, since air is supplied from the left and right ejecting devices 120, the wind speeds of the outside airflow 226 and the inside airflow 227 can be reduced as compared to a case where air is supplied from one side. For that reason, the turbulence of the flow of air is reduced, and the effect of the present invention of suppressing the influence of the disturbance on the internal space S is further exhibited.

The other configurations are the same as those of the booth 10 according to Embodiment 1. Thus, in the booth 20, the same effects as in Embodiment 1 can be obtained except for the effects of the suction device 130.

Additionally, in the booth 20, since the outside airflow 226 and the inside airflow 227 are formed from the left and right with respect to the opening portion 105, each airflow (air curtain) easily covers the opening portion 105. Therefore, it is easy to increase the width of the opening portion 105. On the other hand, since the airflows from the left and right meet in the vicinity of a central portion of the opening portion 105 in the width direction, there is a concern that the airflows are easily disturbed. Thus, the directions of the outside airflow 226 and the inside airflow 227 are substantially parallel to the plane formed by the opening portion 105 (substantially parallel to the front wall portion 103). However, it is preferable that the directions are slightly outward so that the outside airflow 226 and the inside airflow 227 do not easily enter the internal space S.

FIG. 5B is an explanatory view illustrating angles θi1 and θi2 of the inside airflow 227 with respect to the plane P formed by the opening portion 105. The angles θi1 and θi2 of the left and right inside airflows 227 are not particularly limited and are preferably 0° to 45°. The lower limit value is, for example, 1° or more, 3° or more, 5° or more, or 10° or more. Additionally, the upper limit value is, for example, 40° or less, 35° or less, or 30° or less. The angles θi1 and θi2 of the left and right inside airflows 227 may be the same angle or different angles.

Additionally, similarly, with respect to the outside airflow 226, angles θo1 and θo2 of the left and right outside airflows 226 are not particularly limited and are preferably 0° to 45°. The lower limit value is, for example, 1° or more, 3° or more, 5° or more, or 10° or more. Additionally, the upper limit value is, for example, 40° or less, 35° or less, or 30° or less. The angles θo1 and θo2 of the left and right outside airflows 226 may be the same angle or different angles.

Moreover, the angle of the inside airflow 227 and the angle of the outside airflow 226 may be the same angle or different angles.

In addition, the angles (θi1, θi2, θo1, θo2) may be variably controlled depending on conditions such as the temperature and humidity of the internal space S and the external space. Accordingly, for example, even in a case where there is a change in the external environment or the like, the influence of the disturbance on the internal space S can be more excellently suppressed. As a specific example, for example, in a case where the air temperature in the external space rises, the outside airflow 226 and the inside airflow 227 are warmed by the radiant heat generated from the floor or the like, and the outside airflow or the inside airflow easily enters the internal space S. In such a case, the influence of the disturbance can be suppressed by making the angle further outward.

Embodiment 3

FIG. 6 is a view schematically illustrating a cross-section in a vertical plane for illustrating a schematic configuration of a booth 30 according to Embodiment 3. Unlike the booth 10 according to Embodiment 1, the booth 30 does not include the suction device 130 and the pipe 142 to the suction device. Additionally, unlike the booth 10, a transversely mounted ejecting device 320 is provided at an upper edge portion of the opening portion 105. The pipe 141 to the ejecting device for supplying air-conditioning controlled (temperature-controlled) air from the air conditioning device 150 is connected to the ejecting device 320.

The ejecting device 320 forms a two-layer airflow of an outside airflow 326 (first airflow) having a high wind speed and an inside airflow 327 (second airflow) weaker than the outside airflow 326. In addition, the direction of each airflow is downward in the vertical direction.

The other configurations are the same as those of the booth 10 according to Embodiment 1. Thus, also in the booth 30, the same effects as in Embodiment 1 can be obtained except for the effects of the suction device 130.

In the booth 30, the outside airflow 326 and the inside airflow 327 are formed from above the opening portion 105. Thus, the opening portion 105 is less likely to be limited in the width direction thereof, and it is easy to increase the width of the opening portion 105. Additionally, a plurality of the ejecting devices 320 may be configured to be installed side by side along the upper edge portion of the opening portion 105.

Similar to the ejecting device 120 according to Embodiment 1, the ejecting device 320 according to Embodiment 3 used in the booth 30 also includes an outside ejection port (first ejection port) for forming the outside airflow 326 (first airflow) and an inside ejection port (second ejection port) for forming an inside airflow 327 (second airflow) weaker than the outside airflow 326. By applying the ejecting device 320 having the present configuration to a booth including with an opening portion, it is possible to realize a configuration in which the temperature control of the internal space is made excellent while access to the internal space is excellent.

Embodiment 4

FIG. 7 is a view schematically illustrating a cross-section in a vertical plane for illustrating a schematic configuration of a booth 31 according to Embodiment 4. The booth 31 according to Embodiment 4 is a booth in which a suction device 330 disposed so as to face the ejecting device 320 and a pipe to the suction device, which is connected to the suction device 330, are added to the booth 30 according to Embodiment 3. In Embodiment 4, the suction device 330 is disposed below the opening portion 105. The suction device 330 can be disposed at a position higher than the floor surface 90. In this case, the construction of the booth becomes easy. Alternatively, the suction device can be disposed at a position lower than the floor surface 90. In this case, access to the internal space is not hindered. Also in the booth according to Embodiment 4, the same effects as those of the above embodiment can be obtained.

Embodiment 5

FIG. 8 is a view schematically illustrating a cross-section in a vertical plane for illustrating a schematic configuration of a booth 11 according to Embodiment 5. The booth 11 according to Embodiment 5 is a booth in which the suction device 130 and the pipe 142 to the suction device are omitted from the booth 10 according to Embodiment 1. Also in the booth 11 according to Embodiment 5, the same effects as those of the booth 10 according to Embodiment 1 can be obtained except for the effects of the suction device 130.

Embodiment 6

FIG. 9 is a view schematically illustrating a front view of the booth 12 according to Embodiment 6. A booth 60 according to Embodiment 6 is a booth in which an upper cover 160 that covers an upper part of the opening portion 105 is provided in the booth 10 according to Embodiment 1, and the other configurations are the same.

In a case where the temperature of the air supplied from the ejecting device 120 is lower than that of the external space, the air supplied from the ejecting device 120 is heavier than the air of the external space. Therefore, a tendency is observed that the air supplied from the ejecting device 120 flow downward. For that reason, there is a concern that outside air is likely to flow in from the upper part of the opening portion 105. According to the booth 12 according to Embodiment 6, since the upper cover 160 covering the upper part of the opening portion 105 is provided, the inflow of outside air from the upper part of the opening portion 105 can be suppressed.

Additionally, the air supplied from the ejecting device 120 is diffused up, down, left, and right. Thus, in the booth 10 according to Embodiment 1, a part of the air in the upper part of the opening portion 105 is dispersed in an upward direction without facing the suction device 130. However, by providing the upper cover 160, the air supplied from the ejecting device 120 can be straightened in the direction of the suction device 130.

The shape of the upper cover 160 is not particularly limited and is, for example, a plate member installed in the horizontal direction. From the viewpoint of straightening the flow of air supplied from the ejecting device 120, the surface of the upper cover 160 on the opening portion 105 side is preferably formed in a direction in which the air supplied from the ejecting device 120 flows.

Embodiment 7

FIG. 10 is a view schematically illustrating a front view of a booth 21 according to Embodiment 7. The booth 21 according to Embodiment 7 is a booth in which the upper cover 160 that covers the upper part of the opening portion 105 is provided in the booth 20 according to Embodiment 2, and the other configurations are the same. Similar to Embodiment 6, by providing the upper cover 160, the inflow of outside air from the upper part of the opening portion 105 can be suppressed.

Additionally, the air supplied from the ejecting device 120 can be straightened toward the center of the opening portion 105.

The shape of the upper cover 160 includes, for example, a plate member installed in the horizontal direction, similar to Embodiment 6. From the viewpoint of straightening the flow of air supplied from the ejecting device 120, the surface of the upper cover 160 on the opening portion 105 side is preferably formed in a direction in which the air supplied from the ejecting device 120 flows.

Embodiment 8

FIG. 11 is a view schematically illustrating a front view of a booth 13 according to Embodiment 8. In the booth 13 according to Embodiment 8, the wind speeds of the air (outside airflow 126 and inside airflow 127) supplied from the ejecting device 120 are different between an upper part and a lower part of the booth 10 according to Embodiment 1. More specifically, in the booth 13 according to Embodiment 8, the wind speed of an upper air of the air (outside airflow 126 and inside airflow 127) supplied from the ejecting device 120 is faster than the wind speed of a lower air. In addition, the other configurations are the same.

In a case where the temperature of the air supplied from the ejecting device 120 is lower than that of the external space, the air supplied from the ejecting device 120 is heavier than the air of the external space. Therefore, a tendency is observed that the air supplied from the ejecting device 120 flow downward. For that reason, there is a concern that outside air is likely to flow in from the upper part of the opening portion 105. According to the booth 13 according to Embodiment 8, since the wind speed of the air on an upper side of the opening portion 105 is faster than the wind speed of the air on a lower side, the inflow of outside air from the upper part of the opening portion 105 can be suppressed.

Ina case where the wind speed of the air (outside airflow 126 and inside airflow 127) supplied from the ejecting device 120 is changed between the upper part and the lower part, the air may be set to two-step speeds of high speed and low speed or may be set to gradually increase the speed upward at a plurality of steps of speeds.

In addition, the configuration in which the wind speed of the air on the upper side is made faster than the wind speed of the air on the lower side includes not only means for increasing the linear velocity of the air on the upper side but also means for increasing the amount of air on the upper side.

Here, the wind speed of the air suctioned by the suction device 130 may be a constant wind speed in the height direction, or the wind speed of the air suctioned on the upper side may be set to be higher than that on the lower side, similar to the air supplied from the ejecting device 120.

Additionally, as a modification example of the booth 13 according to Embodiment 8, in a case where the air supplied from the ejecting device 120 has a temperature higher than that of the external space, the wind speed of the air on the lower side may be set to be faster than the wind speed of the air on the upper side. Since the air supplied from the ejecting device 120 is lighter than the air in the external space, a tendency to flow upward is observed. Thus, in this case, the inflow of outside air can be suppressed by setting the wind speed of the air on the lower side to be faster than the wind speed of the air on the upper side.

Embodiment 9

FIG. 12 is a view schematically illustrating a front view of a booth 22 according to Embodiment 9. In the booth 22 according to Embodiment 9, the wind speeds of the air (outside airflow 226 and inside airflow 227) supplied from two ejecting devices 120 are different between an upper part and a lower part of the booth 20 according to Embodiment 2. More specifically, in the booth 22 according to Embodiment 9, the wind speed of an upper air of the air (outside airflow 226 and inside airflow 227) supplied from the ejecting device 120 is faster than the wind speed of a lower air. In addition, the other configurations are the same.

Additionally, since the setting of the wind speed of the air supplied from the ejecting device 120 is the same as that of Embodiment 8 the setting is omitted.

Simulation Results

FIGS. 13A to 15C are views illustrating the results of a simulation regarding the temperature distribution of the booth of the present invention. As for the conditions of the simulation, the temperature of the internal space was set to 23° C. and the temperature of the external space was set to 28° C., and the operational effects of the respective components were verified with the goal of satisfying ±0.1° C. as the temperature control of the internal space. In addition, in a case where the ejecting device was installed only on one side in Embodiment 1 and Embodiment 6 of FIGS. 13A and 13B, the wind speeds of the outside airflow and the inside airflow were set to 2 m/s, respectively. Additionally, in a case where the ejecting devices were installed on both sides in Embodiment 2 of FIGS. 14A to 14C and Embodiment 7 of FIGS. 15A to 15C, the wind speeds of the outside airflow and the inside airflow were set to 2 m/s in any of the ejecting devices. As for the results of each simulation, the left figure illustrates the temperature distribution of a vertical cross-section of the opening portion at the position of the inside ejection port, and the right figure illustrates the temperature distribution of the vertical cross-section of the opening portion at the position of the outside ejection port.

FIG. 13A illustrates the temperature distribution using the booth of Embodiment 1 and FIG. 13B illustrates the temperature distribution using the booth of Embodiment 7. In both FIG. 13A and FIG. 13B, an excellent temperature distribution was obtained at the position of the inside ejection port. It is considered that this is because the inside airflow suppresses the inflow of the outside airflow into the internal space while the outside airflow blocks the disturbance.

Additionally, in a case where FIGS. 13A and 13B are compared with each other, it was found that in a case where the upper cover 160 was provided, a better temperature distribution was obtained. It is considered that this is because the airflow ejected from the ejecting device 120 is straightened by the suction device 130 along the upper cover 160 without being dispersed in the upward direction.

FIG. 14A illustrates the temperature distribution of the opening portion in a case where the directions (θi1 and θi2, θo1 and θo2) of the airflow are 0° in the booth of Embodiment 2, FIG. 14B illustrates the temperature distribution of the opening portion in a case where the directions (θi1 and θi2, θo1 and θo2) of the airflows are 15° in the booth of Embodiment 2, and FIG. 14C illustrates the temperature distribution of the opening portion in a case where the directions (θi1 and θi2, θo1 and θo2) of the airflows are 30° in the booth of Embodiment 2.

Comparing FIGS. 14A, 14B, and 14C, it was observed that the temperature distribution in the booth (not illustrated) gave the best result in the case where the directions (θi1 and θi2, θo1 and θo2) of the airflows were 15° (FIG. 14B), and next, the excellent temperature distributions were obtained in order of the case where the directions of the airflows were 30° (FIG. 14C) and the case where the directions of the airflows were 0° (FIG. 14A). It is considered that this is because the directions of the airflows ejected from both sides of the opening portion are directed slightly outward, so that the airflows are guided to the external space side in a case where the airflows on both sides collide with each other.

FIG. 15A illustrates the temperature distribution of the opening portion in a case where the directions (θi1 and θi2, θo1 and θo2) of the airflow are 0° in the booth of Embodiment 7, FIG. 15B illustrates the temperature distribution of the opening portion in a case where the directions (θi1 and θi2, θo1 and θo2) of the airflows are 15° in the booth of Embodiment 7, and FIG. 15C illustrates the temperature distribution of the opening portion in a case where the directions (θi1 and θi2, θo1 and θo2) of the airflows are 30° in the booth of Embodiment 7.

Comparing FIGS. 15A, 15B, and 15C, similar to the booth of Embodiment 2, it was observed that the temperature distribution in the booth (not illustrated) gave the best result in the case where the directions (θi1 and θi2, θo1 and θo2) of the airflows were 15° (FIG. 15A), and next, the excellent temperature distributions were obtained in order of the case where the directions of the airflows were 30° (FIG. 15B) and the case where the directions of the airflows were 0° (FIG. 15C).

In addition, comparing FIGS. 15A and 14B, FIG. 15A had a better temperature distribution. That is, it can be said that the upper cover covering the upper part of the opening portion is particularly excellent in the effect of maintaining the temperature of the internal space.

Appendixes

In the above-described respective embodiments, the airflow covering the opening portion is constituted of the outside first airflow and the inside second airflow. However, for example, the formation of a third airflow between the first airflow and the second airflow is not hindered. In this way, it is possible to form two or more multi-layered airflows.

In the above-described respective embodiments, each booth may be configured to be installed in a room such as a factory so as to form a further partitioned internal space S. However, the booth in the present invention is not limited to such a booth, and a chamber itself constructed as a part of an architecture in a building such as a factory may be the internal space S. Additionally, the booth may not be provided with an air conditioning device, and by applying each embodiment, it is possible to suitably prevent the mixing of dust.

SUMMARY

A booth according to Aspect 1 of the present invention includes an ejecting unit that ejects air into an opening portion leading to an internal space partitioned from an external space. The ejecting unit forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space and a second airflow that suppresses introduction of the first airflow into the internal space inside the first airflow.

According to the above configuration, it is possible to realize the booth that allows easy access to the internal space without deteriorating the environmental conditions.

The booth according to Aspect 2 of the present invention based on the above Aspect 1 may have a configuration in which the ejecting unit ejects the air such that the second airflow is weaker than the first airflow.

According to the above configuration, the second airflow that suppresses the introduction of the first airflow into the internal space can be concretely realized.

The booth according to Aspect 3 of the present invention has a configuration to include an ejecting unit that is provided in an opening portion leading to an internal space partitioned from an external space to eject air toward the opening portion. The ejecting unit ejects the air so as to form a first airflow and a second airflow that is formed inside the first airflow and weaker than the first airflow.

According to the above configuration, it is possible to realize the booth that allows easy access to the internal space without deteriorating the environmental conditions.

The booth according to Aspect 4 of the present invention based on any one of the above Aspects 1 to 3 may have a configuration in which the ejecting unit includes a first ejection port for forming the first airflow and a second ejection port for forming the second airflow.

According to the above configuration, it is possible to concretely realize the formation of the required first airflow and second airflow.

The booth according to Aspect 5 of the present invention based on any of the above Aspects 1 to 4 may have a configuration in which directions of the first airflow and the second airflow are a horizontal direction.

According to the above configuration, the booth including the suction device can be easily manufactured.

The booth according to Aspect 6 of the present invention based on any one of the above Aspects 1 to 4 may have a configuration in which directions of the first airflow and the second airflow are downward in a vertical direction.

According to the above configuration, the opening portion is less likely to be limited in the width direction thereof, and it becomes easy to widen the width of the opening portion.

The booth according to Aspect 7 of the present invention according to any one of the above Aspects 1 to 6 may have a configuration to further include a suction unit that is provided to face the ejecting unit and suctions the air.

According to the above configuration, the targeted air-conditioning control in the internal space can be reliably realized.

The booth according to Aspect 8 of the present invention based on any one of the above Aspects 1 to 5 may have a configuration in which two ejecting units are provided. The two ejecting units may be disposed on both sides of the opening portion. Directions of the first airflow and the second airflow formed by the two ejecting units may be a direction of the opening portion and a direction toward an external space side.

According to the above configuration, the inflow of the outside air can be suppressed. Therefore, the targeted air-conditioning control in the internal space can be reliably realized.

The booth according to Aspect 9 of the present invention based on any one of the above Aspects 1 to 8 may have a configuration to include an upper cover that covers an upper part of the opening portion.

According to the above configuration, the inflow of the outside air can be suppressed. Therefore, the targeted air-conditioning control in the internal space can be reliably realized.

The booth according to Aspect 10 of the present invention based on any one of the above Aspects 1 to 9 may have a configuration in which wind speeds of the first airflow and the second airflow formed by the ejecting unit are different from each other in a height direction.

According to the above configuration, the inflow of the outside air can be suppressed. Therefore, the targeted air-conditioning control in the internal space can be reliably realized.

The booth according to Aspect 11 of the present invention based on any of the above Aspects 1 to 10 may have a configuration to further include an air conditioning unit that performs air-conditioning control of the internal space. The first airflow and the second airflow may be formed by the air supplied by the air conditioning unit.

According to the above configuration, the targeted air-conditioning control in the internal space can be reliably realized.

The booth according to Aspect 12 of the present invention based on anyone of the above Aspects 1 to 11 has a configuration in which a partition member is provided between the external space and the internal space except for the opening portion.

According to the above configuration, it is possible to concretely realize the formation of the required internal space.

An ejecting device according to Aspect 13 of the present invention is an ejecting device that ejects air into an opening portion leading to an internal space partitioned from an external space. The ejecting device includes a configuration to form a first airflow that suppresses introduction of a disturbance from the external space into the internal space, and a second airflow that suppresses introduction of the first airflow into the internal space inside the first airflow.

According to the above configuration, in the booth including the opening portion, it is possible to provide the ejecting device that does not deteriorate the environmental conditions of the internal space while access to the internal space is excellent.

The ejecting device according to Aspect 14 of the present invention a ejecting device that ejects air into an opening portion leading to an internal space partitioned from an external space. The ejecting device includes a configuration to eject the air so as to forma first airflow and a second airflow that is formed inside the first airflow and weaker than the first airflow.

According to the above configuration, in the booth including the opening portion, it is possible to provide the ejecting device that does not deteriorate the environmental conditions of the internal space while access to the internal space is excellent.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope set forth in the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments are also included in the technical scope of the present invention.

It should be understood that the invention is not limited to the above-described embodiment, but may be modified into various forms on the basis of the spirit of the invention. Additionally, the modifications are included in the scope of the invention. 

What is claimed is:
 1. A booth comprising: an ejecting unit that ejects air into an opening portion leading to an internal space partitioned from an external space, wherein the ejecting unit forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space and a second airflow that suppresses introduction of the first airflow into the internal space inside the first airflow.
 2. The booth according to claim 1, wherein the ejecting unit ejects the air such that the second airflow is weaker than the first airflow.
 3. A booth comprising: an ejecting unit that is provided in an opening portion leading to an internal space partitioned from an external space to eject air toward the opening portion, wherein the ejecting unit ejects the air so as to form a first airflow and a second airflow that is formed inside the first airflow and weaker than the first airflow.
 4. The booth according to claim 1, wherein the ejecting unit includes a first ejection port for forming the first airflow and a second ejection port for forming the second airflow.
 5. The booth according to claim 4, wherein the first ejection port and the second ejection port are parallel to each other, and the first ejection port is provided on a side farther from the internal space than the second ejection port.
 6. The booth according to claim 5, wherein the first ejection port blows out the first airflow in a horizontal direction parallel to a plane formed by the opening portion, and the second ejection port blows out the second airflow in the horizontal direction parallel to the plane formed by the opening portion.
 7. The booth according to claim 6, wherein the first airflow and the second airflow are layered airflows that cover the opening portion.
 8. The booth according to claim 1, wherein directions of the first airflow and the second airflow are a horizontal direction.
 9. The booth according to claim 1, wherein directions of the first airflow and the second airflow are downward in a vertical direction.
 10. The booth according to claim 1, further comprising: a suction unit that is provided to face the ejecting unit and suctions the air.
 11. The booth according to claim 10, wherein the suction unit includes at least one vertically elongated suction port for suctioning the first airflow and the second airflow.
 12. The booth according to claim 1, wherein two ejecting units are provided, the two ejecting units are disposed on both sides of the opening portion, and directions of the first airflow and the second airflow formed by the two ejecting units are a direction of the opening portion and a direction toward an external space side.
 13. The booth according to claim 1, further comprising: an upper cover that covers an upper part of the opening portion.
 14. The booth according to claim 1, wherein wind speeds of the first airflow and the second airflow formed by the ejecting unit are different from each other in a height direction.
 15. The booth according to claim 1, further comprising: an air conditioning unit that performs air-conditioning control of the internal space, wherein the first airflow and the second airflow are formed by the air supplied by the air conditioning unit.
 16. The booth according to claim 15, further comprising: an introduction port for introducing the air supplied by the air conditioning unit into the internal space, wherein the introduction port releases a uniformized airflow of which a blowing direction is controlled downward to the internal space.
 17. The booth according to claim 16, further comprising: a lead-out port for leading out the air supplied into the internal space, from the internal space, wherein the air supplied into the internal space is recovered to the air conditioning unit through a pipe to the lead-out port.
 18. The booth according to claim 1, wherein a partition member is provided between the external space and the internal space except for the opening portion.
 19. An ejecting device that ejects air into an opening portion leading to an internal space partitioned from an external space, wherein the ejecting device forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space, and a second airflow that suppresses introduction of the first airflow into the internal space and is formed inside the first airflow.
 20. An ejecting device that ejects air into an opening portion leading to an internal space partitioned from an external space, wherein the ejecting device ejects the air so as to form a first airflow, and a second airflow that is formed inside the first airflow and weaker than the first airflow. 